期刊
PHYSICAL REVIEW D
卷 87, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.054033
关键词
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资金
- European Commission [HPRN-CT-200-00148]
- DGI del MCyT, Spain [FPA2009-09017]
- CA Madrid [S2009ESP-1473]
- MEC [AP2007-00385]
- U.S. Department of Energy [DE-FG02-05ER41360]
- U.S. National Science Foundation [NSF-PHY-0969510]
We present an antenna shower formalism that includes helicity dependence for massless partons. The formalism applies to both traditional (global) showers and sector-based variants. We combine the shower with VINCIA's multiplicative approach to matrix-element matching, generalized to operate on each helicity configuration separately. The result is a substantial gain in computational speed for high parton multiplicities. We present an implementation of both sector and global showers, with min/max variations, and helicity-dependent tree-level matching applied through n <= 4 for V/H -> q (q) over bar + n partons and through n <= 5 for H -> n gluons. DOI: 10.1103/PhysRevD.87.054033
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